you had better finish _______ your homework. A. do B. doing C. to do
---Bob doing homework? ---No, he isn’t. He is a letter.
---- Well. _______ ---It’s windy. Let’s fly a kite
My uncle works in a ______. Many people go to have dinner there.
I like penguins because they are ______ interesting.
---Is Mr Green London? ---Yes, but he is Shanghai now.